PANGAEA_989981 Branched glycerol dialkyl glycerol tetraethers (brGDGTs) analysis of the Lago Grande di Monticchio (Italy) d'Oliveira, Léa; Maignan, Adrien; Peyron, Odile; Joannin, Sébastien; Combourieu-Nebout, Nathalie; Genet, Marion; Lestienne, Marion; Dugerdil, Lucas; Fernandez, Giada; Giaccio, Biagio; Monaco, Lorenzo; Nomade, Sébastien; Pereira, Alison; Scao, Vincent; Regnier, Edouard; Balasse, Marie; Ménot, Guillemette Branched glycerol dialkyl glycerol tetraethers (brGDGTs) analysis of the Lago Grande di Monticchio (Italy) 2026-02-13 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.989981 Investigator Adrien Maignan adrien.maignan@hotmail.fr Investigator Léa d'Oliveira lea.d-oliveira@umontpellier.fr Earth Science Sample ID DEPTH, sediment/rock Calendar age Branched glycerol dialkyl glycerol tetraether 5-methyl branched glycerol dialkyl glycerol tetraether, IIIa, relative abundance 6-methyl branched glycerol dialkyl glycerol tetraether, IIIa, relative abundance 7-methyl branched glycerol dialkyl glycerol tetraether, IIIa, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, IIIb, relative abundance 6-methyl branched glycerol dialkyl glycerol tetraether, IIIb, relative abundance 7-methyl branched glycerol dialkyl glycerol tetraether, IIIb, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, IIIc, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, IIa, relative abundance 6-methyl branched glycerol dialkyl glycerol tetraether, IIa, relative abundance 7-methyl branched glycerol dialkyl glycerol tetraether, IIa, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, IIb, relative abundance 6-methyl branched glycerol dialkyl glycerol tetraether, IIb, relative abundance 7-methyl branched glycerol dialkyl glycerol tetraether, IIb, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, IIc, relative abundance 6-methyl branched glycerol dialkyl glycerol tetraether, IIc, relative abundance 7-methyl branched glycerol dialkyl glycerol tetraether, IIc, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, Ia, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, Ib, relative abundance 5-methyl branched glycerol dialkyl glycerol tetraether, Ic, relative abundance Methylation index of 5-methyl branched tetraethers Cyclization ratio of branched tetraethers prime Isomer ratio of 6-methyl branched glycerol dialkyl glycerol tetraethers Isoprenoid acyclic glycerol dialkyl glycerol tetraether/Crenarchaeol ratio Temperature, air, annual mean Temperature, air, mean of months, above freezing pH geoscientificInformation brGDGTs Drilling/coring Holocene Italy MONTI23-II Paleoclimate reconstructions Pollen Age, tephra-chronostratigraphy High Performance Liquid Chromatography - Mass spectrometry (HPLC-MS) Calculated according to De Jonge et al. (2014a) Calculated according to De Jonge et al. (2014b) Calculated according to Blaga et al. (2009) Calculated according to Bauersachs et al. (2024) Calculated according to Raberg et al. (2021) Calculated according to Martínez-Sosa and Tierney (2019) Calculated according to Russel et al. (2018) 2023-05-31 2023-05-31 Complete 40.9296 40.9296 15.605699 15.605699 0.0 m (DEPTH, sediment/rock) 9.396 m (DEPTH, sediment/rock) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 3317 data points text/tab-separated-values d'Oliveira, Léa; Maignan, Adrien; Peyron, Odile; Joannin, Sébastien; Combourieu-Nebout, Nathalie; Genet, Marion; Lestienne, Marion; Dugerdil, Lucas; Fernandez, Giada; Giaccio, Biagio; Monaco, Lorenzo; Nomade, Sébastien; Pereira, Alison; Scao, Vincent; Regnier, Edouard; Balasse, Marie; Ménot, Guillemette (submitted): North–south Holocene seasonal contrast on the Italian peninsula: clarification of the latitudinal transition zone based on the multi-proxy study of Lago Grande di Monticchio. Quaternary Science Reviews Bauersachs, Thorsten; Schubert, Carsten J; Mayr, Christoph; Gilli, Adrian; Schwark, Lorenz (2024): Branched GDGT-based temperature calibrations from Central European lakes. Science of the Total Environment, 906, 167724, https://doi.org/10.1016/j.scitotenv.2023.167724 Blaga, Cornelia I; Reichart, Gert-Jan; Heiri, Oliver; Sinninghe Damsté, Jaap S (2009): Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north–south transect. Journal of Paleolimnology, 41(3), 523-540, https://doi.org/10.1007/s10933-008-9242-2 De Jonge, Cindy; Hopmans, Ellen C; Zell, Claudia; Kim, Jung-Hyun; Schouten, Stefan; Sinninghe Damsté, Jaap S (2014): Occurrence and abundance of 6-methyl branched glycerol dialkyl glycerol tetraethers in soils: Implications for palaeoclimate reconstruction. Geochimica et Cosmochimica Acta, 141, 97-112, https://doi.org/10.1016/j.gca.2014.06.013 De Jonge, Cindy; Stadnitskaia, Alina; Hopmans, Ellen C; Cherkashov, Georgy A; Fedotov, Andrey; Sinninghe Damsté, Jaap S (2014): In situ produced branched glycerol dialkyl glycerol tetraethers in suspended particulate matter from the Yenisei River, Eastern Siberia. Geochimica et Cosmochimica Acta, 125, 476-491, https://doi.org/10.1016/j.gca.2013.10.031 Hopmans, Ellen C; Schouten, Stefan; Sinninghe Damsté, Jaap S (2016): The effect of improved chromatography on GDGT-based palaeoproxies. Organic Geochemistry, 93, 1-6, https://doi.org/10.1016/j.orggeochem.2015.12.006 Martínez-Sosa, Pablo; Tierney, Jessica E (2019): Lacustrine brGDGT response to microcosm and mesocosm incubations. Organic Geochemistry, 127, 12-22, https://doi.org/10.1016/j.orggeochem.2018.10.011 Raberg, Jonathan H; Harning, David J; Crump, Sarah E; de Wet, Gregory A; Blumm, Aria; Kopf, Sebastian; Geirsdóttir, Áslaug; Miller, Gifford H; Sepúlveda, Julio (2021): Revised fractional abundances and warm-season temperatures substantially improve brGDGT calibrations in lake sediments. Biogeosciences, 18(12), 3579-3603, https://doi.org/10.5194/bg-18-3579-2021 Russell, James M; Hopmans, Ellen C; Loomis, Shannon E; Liang, Jie; Sinninghe Damsté, Jaap S (2018): Distributions of 5- and 6-methyl branched glycerol dialkyl glycerol tetraethers (brGDGTs) in East African lake sediment: Effects of temperature, pH, and new lacustrine paleotemperature calibrations. Organic Geochemistry, 117, 56-69, https://doi.org/10.1016/j.orggeochem.2017.12.003

This dataset contains the concentration and relative abundance of branched glycerol dialkyl glycerol tetraethers (brGDGTs) components, along with Methylation of Branched Tetraethers (MBT'5Me), Cyclisation of Branched Tetraethers (CBT'), isomer ratio of 6-methyl branched glycerol dialkyl glycerol tetraethers (IR6Me) and Isoprenoid acyclic glycerol dialkyl glycerol tetraether/Crenarchaeol ratio (isoGDGT-0/Cren), for the sedimentary record of Lago Grande di Monticchio (Italy) covering the last 12,900 years. The analysis was performed by a double microwave extraction at 70°C with dichloromethane (DCM)-methanol (MeOH) mixture (3:1, v/v), filtered on a solid-phase extraction (SPE) cartridge and then separated into polar and apolar fractions on a silica column with a hexane-DCM (1:1, v/v) and DMC-MeOH (1:1, v/v) mixtures, respectively. Samples were then analysed by high-performance liquid chromatography with mass spectrometry (HPLC-MS) in hexane-propanol (98.2:0.2, v/v). Ions in selected ion monitoring (SIM) are detected for mass-to-change ratios according to Hopmans et al. (2016, doi: 10.1016/j.orggeochem.2015.12.006). The data table also contains the quantitative climate reconstructions inferred from brGDGTs (mean annual temperature and mean temperature of months above freezing) from four different calibrations (linear and multiple regression and Bayesian calibration; Martínez-Sosa and Tierney, 2019; Raberg et al. 2021; De Jonge et al. 2014; Bauersachs et al. 2024), and the pH reconstruction based on the calibration of Russel et al. (2018). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.989981"!

https://doi.org/10.1007/s10933-008-9242-2 Calculated according to Blaga et al. (2009) https://doi.org/10.1007/s10933-008-9242-2 Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north–south transect https://doi.org/10.1016/j.gca.2013.10.031 Calculated according to De Jonge et al. (2014a) https://doi.org/10.1016/j.gca.2013.10.031 In situ produced branched glycerol dialkyl glycerol tetraethers in suspended particulate matter from the Yenisei River, Eastern Siberia https://doi.org/10.1016/j.gca.2014.06.013 Calculated according to De Jonge et al. (2014b) https://doi.org/10.1016/j.gca.2014.06.013 Occurrence and abundance of 6-methyl branched glycerol dialkyl glycerol tetraethers in soils: Implications for palaeoclimate reconstruction https://doi.org/10.1016/j.orggeochem.2015.12.006 The effect of improved chromatography on GDGT-based palaeoproxies https://doi.org/10.1016/j.orggeochem.2017.12.003 Calculated according to Russel et al. (2018) https://doi.org/10.1016/j.orggeochem.2017.12.003 Distributions of 5- and 6-methyl branched glycerol dialkyl glycerol tetraethers (brGDGTs) in East African lake sediment: Effects of temperature, pH, and new lacustrine paleotemperature calibrations https://doi.org/10.1016/j.orggeochem.2018.10.011 Calculated according to Martínez-Sosa and Tierney (2019) https://doi.org/10.1016/j.orggeochem.2018.10.011 Lacustrine brGDGT response to microcosm and mesocosm incubations https://doi.org/10.1016/j.scitotenv.2023.167724 Branched GDGT-based temperature calibrations from Central European lakes https://doi.org/10.1016/j.scitotenv.2023.167724 Calculated according to Bauersachs et al. (2024) https://doi.org/10.5194/bg-18-3579-2021 Calculated according to Raberg et al. (2021) https://doi.org/10.5194/bg-18-3579-2021 Revised fractional abundances and warm-season temperatures substantially improve brGDGT calibrations in lake sediments DIF 9.4 2026-02-13 2026-07-15